Low power high speed quadrature generator
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United States of America Patent
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Oct 20, 2015
Grant Date -
Dec 11, 2014
app pub date -
Jul 3, 2013
filing date -
Jun 11, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
An apparatus comprising a latch comprising a differential inverter configured to receive a differential input signal and generate a differential output signal, a pair of cross-coupled inverters coupled to the differential inverter, and a first clock switch configured to couple the differential inverter to a voltage source, a second clock switch configured to couple the differential inverter to a ground, wherein the first clock switch and the second clock switch are configured to receive a differential clock signal, and wherein the first clock switch and the second clock switch are both open or both closed depending on the differential clock signal, a second latch, wherein the first latch and the second latch are configured as a frequency divider, and a logic circuit coupled to each latch, wherein the logic circuits are configured to generate both an in-phase reference output signal and a quadrature output signal.
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